Having heard sounds of distress coming from our bathroom, I went inside to check out what was going on. Upon opening the door, I caught my stepsister Anna literally freaking out with a pregnancy test in her hand. She showed it to me, and, sure enough, it was positive. When she actually realized that there was a chance I might tell this to her mother and my dad, she started begging me to keep it a secret. As she was sitting on her toilet, I had the perfect view inside of her revealing shirt and was able to see most of her round tits, which made me horny as hell. I do not have to tell you how much I wanted to fuck her ever since I laid my eyes on her for the first time. And here was the perfect opportunity for that. I mean, what could happen? She definitely cannot get pregnant again! So, I told her that I would keep silent if she let me bang her. Of course, my request shocked her, but what was she to do? Whipping my dick out of my pants, she moved it towards her open mouth and wrapped her lusty lips around it. After she blew my member for a while, we went to her bedroom where she sucked it some more for a bit before stripping. Once she removed her shirt and her bra and unveiled her big boobs, I started seeing red from a sudden surge of blood down to my fat cock. Standing there in front of me with her tight and slim body, Anna was the wet dream come true. She got down on her knees to suck on my schlong once again before eventually dropping her short denim skirt. Then, turning her cute ass towards me, she dropped her panties as well and let me slide my already-pulsating boner deep inside of her dripping wet muff. After I fucked her in the doggystyle position for a while, she made me lay down on my back, tasted my prick once again and then slid it inside of her delicious beaver in order to ride it in the cowgirl position. When she got bored of it, my hot stepsis turned her back towards me once again and bounced on top of my thick pecker like that for a while before facing me yet again. When she turned to face me for the second time, I saw the immense pleasure in her eyes which, in turn, made it impossible for me to contain myself anymore, so I went on and filled up her pink slit with my sticky white sperm.